麦秆不同形态区域中硅的碱稳定性  

Alkali Stability of Silicon in Different Morphological Regions of Wheat Stem

作　　者：邱玉桂[1] 云娜[2] 蔡联生[1] 董晖 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广州510640 [2]广东轻工职业技术学院,广州510300 [3]河南银鸽实业投资股份有限公司,河南漯河462000

出　　处：《中国造纸学报》2004年第2期1-5,共5页Transactions of China Pulp and Paper

基　　金：国家自然科学基金 (2 0 2 770 1 2;2 98760 1 2 )资助项目

摘　　要：用SEM -EDAX法研究麦草原料中的Si在碱法制浆过程中的残留情况。结果表明 ,在碱法制浆过程中 ,麦秆外表面皮层及皮下纤维层中的Si对碱的稳定性较差 ,麦秆内部的维管束及内表皮层中Si的碱稳定性较高 ;原料的Si脱除率仅为 60 %～ 70 % ,浆中残留的Si量为30 %～ 40 % ,且主要分布在麦秆内部的细胞中。The profile of residual silicon in different parts of wheat stem during alkaline pulping was studied by means of SEM-EDAX. The results show that, under the experimental conditions, the alkali stability of silicon in outer cuticle and in its neighboring fiber wall is lower, and that of the silicon in bundle sheath and in inner epidermis is very high. The removal rate of silicon of wheat stem is only 60% to 70%. The residual silicon, about 30% to 40% of the original silicon, mainly remains in the inner organs and inner epidermis of the stem. The obvious distinction of alkali stability indicates the remarkable differences in chemical state of the mineral elements such as silicon etc. in the various parts of wheat stem.

关 键 词：麦秆 残留 维管束 矿质元素 草原 形态 外表面 碱法制浆 SEM-EDAX法 麦草 

分 类 号：TS721[轻工技术与工程—制浆造纸工程] S511[农业科学—作物学]